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Question

我需要以某种方式将这两个查询放入一个查询中：

1

select fac_name, datename(month,b.startdt) as 'month', year(b.startdt) as 'year', count(a.empfk) as '#filled'  
from tbl_tmx_attempt a  
left outer join tbl_tmx_activity b on a.activityfk = b.activity_pk  
left outer join tbl_tmx_actloc c on b.activity_pk = c.activityfk  
left outer join loc d on c.locfk = d.loc_pk  
left outer join fac e on d.loc_facfk = e.fac_pk  
where b.startdt > '12/31/08'    
group by fac_name, year(b.startdt), month(b.startdt), datename(month,b.startdt)

2

select fac_name, datename(month,b.startdt) as 'month', year(b.startdt) as 'year', sum(b.maxcapacity) as 'capacity'  
from tbl_tmx_activity b   
left outer join tbl_tmx_actloc c on b.activity_pk = c.activityfk  
left outer join loc d on c.locfk = d.loc_pk  
left outer join fac e on d.loc_facfk = e.fac_pk  
where b.startdt > '12/31/08'  
group by fac_name, year(b.startdt), month(b.startdt), datename(month,b.startdt)

除了来自计算不同字段的不同表的计数之外，一切都基本相同。我需要将结果显示为一个显示容量的表和#filled

Answer 1

您可以使用Union语句，只为每个语句添加一个空列。像这样：

select fac_name, datename(month,b.startdt) as 'month', year(b.startdt) as 'year', count(a.empfk) as '#filled' , '' as 'capacity' 
from tbl_tmx_attempt a  
left outer join tbl_tmx_activity b on a.activityfk = b.activity_pk  
left outer join tbl_tmx_actloc c on b.activity_pk = c.activityfk  
left outer join loc d on c.locfk = d.loc_pk  
left outer join fac e on d.loc_facfk = e.fac_pk  
where b.startdt > '12/31/08'    
group by fac_name, year(b.startdt), month(b.startdt), datename(month,b.startdt)

Union All

select fac_name, datename(month,b.startdt) as 'month', year(b.startdt) as 'year', '' as '#filled', sum(b.maxcapacity) as 'capacity'  
from tbl_tmx_activity b   
left outer join tbl_tmx_actloc c on b.activity_pk = c.activityfk  
left outer join loc d on c.locfk = d.loc_pk  
left outer join fac e on d.loc_facfk = e.fac_pk  
where b.startdt > '12/31/08'  
group by fac_name, year(b.startdt), month(b.startdt), datename(month,b.startdt)

如果由于您无法执行组操作而无法正常工作，请尝试将行插入包含capacity和#filled列的临时表中。你只需要为每个插入留一个空。如果你正在寻找的是两行结果，那么我会做同样的事情，除了将结果插入2个独立的临时表，并在他们独特的列上进行OUTER JOIN，我认为这将是fac_name，month和year。评论我的帖子，如果这不起作用或不是你想要做的。

Answer 2

左边连接会更容易。

就是这样，会发生这样的事情：

select fac_name, [month], [year], max([#filled]) as [#filled], max(capacity) as [capacity]

from (

  select fac_name, datename(month,b.startdt) as 'month', year(b.startdt) as 'year', count(a.empfk) as '#filled', null as 'capacity'
  from tbl_tmx_attempt a  
  left outer join tbl_tmx_activity b on a.activityfk = b.activity_pk  
  left outer join tbl_tmx_actloc c on b.activity_pk = c.activityfk  
  left outer join loc d on c.locfk = d.loc_pk  
  left outer join fac e on d.loc_facfk = e.fac_pk  
  where b.startdt > '12/31/08'    
  group by fac_name, year(b.startdt), month(b.startdt), datename(month,b.startdt) 

  union all

  select fac_name, datename(month,b.startdt) as 'month', year(b.startdt) as 'year', null as '#filled', sum(b.maxcapacity) as 'capacity'  
  from tbl_tmx_activity b   
  left outer join tbl_tmx_actloc c on b.activity_pk = c.activityfk  
  left outer join loc d on c.locfk = d.loc_pk  
  left outer join fac e on d.loc_facfk = e.fac_pk  
  where b.startdt > '12/31/08'  
  group by fac_name, year(b.startdt), month(b.startdt), datename(month,b.startdt)  

  ) a

group by fac_name, [month], [year]

Answer 3

你不能只使用SQL Union运算符吗？ SQL Union Operator

在一个查询中计算两个不同表中的两个不同字段

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3 个答案: